[Retros] About T.Orban problem; Yefim's letter 01/12/2005

[Nicolas.Dupont at math.univ-lille1.fr]

> More interesting: Several solutions in N halfmoves, -no- solutions in N+1

> halfmoves, and 1 solution for N+2 halfmoves.


It is enough to begin by 1.d3 to avoid solutions in N+1 half moves
(pointed by Ryan).

tcfdrfct/ppp3pp/3p1p2/8/8/3P4/PPP1PPPP/TC1DRFCT

4 solutions in 3 moves, 0 solutions in 3,5 moves, 1 solution  in 4 moves.

Nicolas.